实现一个简单的多用户五子棋的游戏程序，包括如下两个界面

（1）选择对弈桌及角色（执黑、执白、观看）。

（2）在游戏界面，有开始，退出（游戏未结束、点退出自动判负）；发言及显示区；用户列表区；棋盘绘制区。

-Implement a simple multi-user games backgammon program, including the following two interfaces (1) Select the chess table and role (player using these pieces, player using to watch.) (2) in the game interface, that has a beginning, exit (not the end of the game, point out automatically forfeit)　to speak and display area　the user list area　board drawing area.